BROADCAST SOUND VOLUME CONTROLLER AND SOUND VOLUME CONTROL METHOD OF THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a broadcast sound volume controller capable of outputting a broadcast sound with a volume of a degree that never makes a listener feel difficulty in listening.;SOLUTION: The sound volume controller comprises: a calculator which calculates an SN ratio of a broadcast sound signal to a noise signal in a predetermined frequency band; and a controller which determines the amplification factor of an amplifier for amplifying the broadcast sound signal so that the calculated SN ratio becomes the target value of the SN ratio being the index of the lowest audible sound volume of a broadcast sound.;COPYRIGHT: (C)2013,JPO&INPIT